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Initialization. Uboot hardware init, loads kernelKernel remaining initialization, calls init"Init 1st process, executes startup script/etc/init.d/rcSRun_flphone.sh startup scriptNano-X the X-Windows serverNanowm sets bg image. 2. System Structure . MicroKernel minimal functional
                
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1. Linux Architecture Overview 1 
2. Initialization Uboot  hardware init, loads kernel
Kernel  remaining initialization, calls init
Init  1st process, executes startup script
/etc/init.d/rcS
Run_flphone.sh  startup script
Nano-X  the X-Windows server
Nanowm  sets bg image 2 
3. System Structure  MicroKernel  minimal functionality
Interprocess communication (IPC)
Memory management
Autonomous processes & co-routines
VFS
Network stack
Process manager
Device drivers
Non-kernel
windowing system
compiler
shells
Editors
utilities 
 3 
4. System Structure-2 4